Improvement in low-water indicators



To all whom mag/concern an opening, f, through t am sav @anni (titilleRALPH n.r CARPENTER,

or TIPPECANonoHIo.

`Leners Pamela. 105,222, @me .my 119, 1870.

IMPRQVEMENT'IN Low-WATER INDICATORS.

, The Schedulenjvaferred to in Lhasa LettersPatent and making part ofthe same Befit known thatV I, RALPH R. CARPENTER, of Tippecanoe, in thecounty of Miami and State of Ohio, have invented a new and usefulImprovement in Lowvwater` Indicatorsfor Steam-Boilers; and the follow#ingis declaredto hea full `and completedescription thereof.. Y x

This invention rel ites to that class of indicators in which the heat of'the steam is made use of to ex'- pand a tube,ithe`expansion acting toopen a ,valve to -an alarm when the waterfalls below a certain point.4

I makenuse of atube or barrel, andplace'the saine above a steam-boiler,a pipe from' the barrel running down into the `boiler tothe-low-waterline;`an arm fromtheside of thispipe sustains a T-shaped-lever,^

which is' hung `upon a fulcrum, the longer arm of which lever isconnected with a valve, and the short arms connect by tierods'with theexpanding-tube or :barrel,(so that expansion of the barrel will act uponthe lever through the tie-rods to open the alarm-valve and blow -awhistle. i

The pipe from the expandiug-tubeopens intoa pasy sage to thealarm-whistle below` the valve, so that -when the water falls below thesafety point, the steam will enter the tuhe,and fthe `expansion of thebarrel will open the valve 'and blowthe whistle.

In the drawingi Figure lis avertical- 'section of my apparatus, andFigure 2 is a side elevation, partly in section, to`

`show the head of 'the T-sha-ped lever.

a is a vertical pipe from the steam ningdown'to the low-water line.

The globe-valve?) in thisA pipe may be used Ito cut 'oi the indicator,if `it becomes necessary.

The pipe lt sustains uponits upper end-the expan- `sion-tube o, which isclosed by the cap c' 'at the upper rlhe arm d, from the `side of thepipe @sustains at its outer endthe 'vertical pipe e to the `whistle e',and

je arm d connectsA the pipes.

a andre-toadmit steam. The angley of' this openingf is formedas, avalveseat for the valve g, which valve g extends through v the arm d n avertical direction, and is sustained beheaded lever h.

,low the'arm-dvby the longer end of the cross or T4 The end of the valveis formed as a screwpin, and

anat, i, secures it tothe arm h. .l

' The cross-headed lever his upon a fulcrum-piml,

in lugs'npon the lower side of the arm d, and, being T-shape, thecross-head' portion- 7o' extends atrght angles tothe longer arm, and thecross-head is ofa length that allows for receiving the .suspending-rodsm clear ofthe sides of the tube c.

The tie-rods m, pass fromlugs 5 upon'the cap c' of the barrel c to thiscross-head h', and the screw-nuts 2 upon tie-rods, lm, allow foradjustment.

lhe spring o is placed upon the cross-head It', its forkedends 'beingaround thetie-rods m, and the nuts 3 serveto tighten the spring o uponthe cross-head h', to give `the pressure necessary to keep the valve gup to its seat and allow for the eilect ofthe slight expansion by theheat from the contiguous boiler.

'lhe valve g is provided with a tightening-nut, 4, and elastic packing,to keep the parts steam-tight.

This construction gives easy access to the valve for renewing thepacking or grinding inthe valve.

When the water in the boiler falls below` the end I of pipe a, the waterin the barrel c runs down and steam passes into the. pipe a, barrel c,and opening f,

` the heat expands the barrel lengthwise, and this expansionacts'through the tie-rods mand cross-headed lever 7L h to open the valver/ and admit steam to the whistle.

I The tie-rods being upon the short endet the lever h, the motion ismultiplied atthevalve; thus asmall amount of expansion will open thevalve o sutciently to blow the whistle.

This constructionoi parts makes a compact andv reliable indicator forsteam-generators, not liable to get out of order, and gives easy ac cessfor repairs.

I claim as my invention#- 1. The T-shaped lever h h', and springe,combined` with the rodsm, 'nuts 3, expansionftube a, and valve g,substantially as and furthe purposes speciiied.

2. The valve g, accessible from the outside of the steam-passage ofanalarm-whistle, substantially as and forV the purposes set forth.

Dated this 20th day'of May, A. D. 1870. Witnesses: RALPH R. CARPENTER.

Guns. H. SMITH, l GEO. T. PINCKNEY.

